Knottingley Resistivity survey of the fort (The Romans)

Roall, near Knottingley: Resistivity survey of the fort

Sometimes a lot of information about a site can be gathered without doing any excavation. This fort near Knottingley was identified by aerial photography and later a resistivity survey was carried out on the site. Archaeologists measured the ground resistivity at given points on a grid laid out over the site. The information gained was plotted on a computer, giving the result shown here. The playing card shape of the fort is clearly visible, as are some of the streets and structures inside.

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